I'm trying to get a song mix

Recorded on Garageband. I need to mix it and make it sound way better, like I need the vocals to sound way better. I want the vocals to sit perfectly on top of the mix. I'm trying to get it by next week. Thanks

Additional info:
I'm going to hire a different mastering engineer. The song has somewhere between 10 and 30 tracks recorded that need mixing. I don't have a hard deadline for this. I need the mixer to do some editing, time aligning and vocal tuning before mixing. Check out the song I attached. I'm hoping to find a good mixer that can work with my limited budget.